计量立法的宗旨是什么?
参考答案:
加强计量监督管理,保障国家计量单位制的统一和量值的准确可靠,有利于生产,贸易和科学技术的发展,适应社会主义现代化建设的需要,维护国家,人民的利益。
They said that they were going to the farm if it ________ the next Sunday. [ ]
A. didn't rain
B. would rain
C. was going to rain
D. rained
沙门菌在SS琼脂上生长时其菌落常呈现出无色或()
A.浅蓝色
B.深蓝色
C.微黄色
D.浅灰色
E.深灰色